Uncertainty analysis based on sensitivity applied to angle-ply composite structures

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Carlos Conceição António (Author) FEUP; Luísa N. Hoffbauer (Author) Other

Journal

Title: Reliability Engineering and System Safety

Vol. 92 No. 10

Pages: 1353-1362

ISSN: 0951-8320

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 22 Citations

Scopus - 27 Citations

INSPEC

Other information

Authenticus ID: P-004-7BT

DOI: 10.1016/j.ress.2006.09.006

Abstract (EN): This article describes a finite element-based formulation for the statistical analysis of the response of stochastic structural composite systems whose material properties are described by random fields. A first-order technique is used to obtain the second-order statistics for the structural response considering means and variances of the displacement and stress fields of plate or shell composite structures. Propagation of uncertainties depends on sensitivities taken as measurement of variation effects. The adjoint variable method is used to obtain the sensitivity matrix. This method is appropriated for composite structures due to the large number of random input parameters. Dominant effects on the stochastic characteristics are studied analyzing the influence of different random parameters. In particular, a study of the anisotropy influence on uncertainties propagation of angle-ply composites is carried out based on the proposed approach.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10